| Term | Definition |
| 20 - tcp
21 - tcp | Protocol - FTP
[ File Transfer Protocol ]
Sends and receives files between systems |
| 22 - tcp | Protocol - SSH
[ Secure Shell ]
Encrypted console login |
| 22 - tcp | Protocol - SCP
[ Secure Copy ]
Relatively simple file copy over SSH |
| 22 - tcp | Protocol - SFTP
[ Secure File Transfer Protocol ]
SSH file transfer with file management |
| 23 - tcp | Protocol - Telnet
[ Telecommunication Network ]
Remote console login to network devices |
| 25 - tcp | Protocol - SMTP
[ Simple Mail Transfer Protocol ]
Transfer email between mail servers |
| 53 - udp
53 - tcp | Protocol - DNS
[ Domain Name Services ] (Server or System)
Convert domain names to IP addresses |
| 69 - udp | Protocol - TFTP
[ Trivial File Transfer Protocol ]
A very simple file transfer protocol |
| 80 - tcp | Protocol - HTTP
[ Hypertext Transfer Protocol ]
Web Server Communication |
| 110 - tcp | Protocol - POP3
[ Post Office Protocol version 3 ]
Receive mail into a mail client |
| 137 - udp | Protocol - NetBIOS
[ NetBIOS name service ]
Register, remove, and find services by name |
| 138 - udp | Protocol - NetBIOS
[ NetBIOS datagram service ]
Connectionless data transfer |
| 139 - tcp | Protocol - NetBIOS
[ NetBIOS session service ]
Connection-oriented data transfer |
| 143 - tcp | Protocol - IMAP4
[ Internet Message Access Protocol v4 ]
A newer mail client protocol |
| 161 - udp | Protocol - SNMP
[ Simple Network Management Protocol ]
Gather statistics and manage network devices |
| 443 - tcp | Protocol - HTTPS
[ Hypertext Transfer Protocol Secure ]
Web server communication with encryption |
| 443 - tcp | Protocol - TLS/SSL
[ Transport Layer Security and Secure Sockets Layer ]
Secure protocols for web browsing |
| 989 - tcp
990 - tcp | Protocol - FTPS
[ File Transfer Protocol over Secure Sockets Layer ]
Adds security to FTP with TLS/SSL |
| 3389 - tcp | Protocol - RDP
[ Remote Desktop Protocol ]
Graphical display of remote device |
| - | Protocol - ICMP
[ Internet Control Message Protocol ]
Send management messages between devices |
| Various | Protocol - IPsec
[ Internet Protocol Security ]
Authentication, integrity, confidentiality, and encryption |